Mentions were introduced in Linchpin Hey 2.10 and allow you to... mention other users. Yay!
To mention others, enter their @name (at+name) in the text input area of posts, news or comments.
Users who were mentioned will receive a notification about it, including a link to view the mention.
The mention itself will becomea clickable link which will open the profile of the mentioned user.
The mentions functionality offers an integrateduser selection tool which appears right after you have typed in the @-sign into a supported text editor.
Since Linchpin Hey 2.11, mentions are also available for the mobile app!
Using mentions can be as simple a typing in the @-sign and clicking on the card of the user you are looking for. If a user you are looking for is not included in the user selection tool, enter their name. With every new letter you enter the selection tool becomes more precise.